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1/* SPDX-License-Identifier: GPL-2.0 or MIT */2/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */3/* Copyright 2023 Collabora ltd. */4 5#ifndef __PANTHOR_GEM_H__6#define __PANTHOR_GEM_H__7 8#include <drm/drm_gem_shmem_helper.h>9#include <drm/drm_mm.h>10 11#include <linux/iosys-map.h>12#include <linux/rwsem.h>13 14struct panthor_vm;15 16/**17 * struct panthor_gem_object - Driver specific GEM object.18 */19struct panthor_gem_object {20 /** @base: Inherit from drm_gem_shmem_object. */21 struct drm_gem_shmem_object base;22 23 /**24 * @exclusive_vm_root_gem: Root GEM of the exclusive VM this GEM object25 * is attached to.26 *27 * If @exclusive_vm_root_gem != NULL, any attempt to bind the GEM to a28 * different VM will fail.29 *30 * All FW memory objects have this field set to the root GEM of the MCU31 * VM.32 */33 struct drm_gem_object *exclusive_vm_root_gem;34 35 /**36 * @gpuva_list_lock: Custom GPUVA lock.37 *38 * Used to protect insertion of drm_gpuva elements to the39 * drm_gem_object.gpuva.list list.40 *41 * We can't use the GEM resv for that, because drm_gpuva_link() is42 * called in a dma-signaling path, where we're not allowed to take43 * resv locks.44 */45 struct mutex gpuva_list_lock;46 47 /** @flags: Combination of drm_panthor_bo_flags flags. */48 u32 flags;49};50 51/**52 * struct panthor_kernel_bo - Kernel buffer object.53 *54 * These objects are only manipulated by the kernel driver and not55 * directly exposed to the userspace. The GPU address of a kernel56 * BO might be passed to userspace though.57 */58struct panthor_kernel_bo {59 /**60 * @obj: The GEM object backing this kernel buffer object.61 */62 struct drm_gem_object *obj;63 64 /**65 * @vm: VM this private buffer is attached to.66 */67 struct panthor_vm *vm;68 69 /**70 * @va_node: VA space allocated to this GEM.71 */72 struct drm_mm_node va_node;73 74 /**75 * @kmap: Kernel CPU mapping of @gem.76 */77 void *kmap;78};79 80static inline81struct panthor_gem_object *to_panthor_bo(struct drm_gem_object *obj)82{83 return container_of(to_drm_gem_shmem_obj(obj), struct panthor_gem_object, base);84}85 86struct drm_gem_object *panthor_gem_create_object(struct drm_device *ddev, size_t size);87 88struct drm_gem_object *89panthor_gem_prime_import_sg_table(struct drm_device *ddev,90 struct dma_buf_attachment *attach,91 struct sg_table *sgt);92 93int94panthor_gem_create_with_handle(struct drm_file *file,95 struct drm_device *ddev,96 struct panthor_vm *exclusive_vm,97 u64 *size, u32 flags, uint32_t *handle);98 99static inline u64100panthor_kernel_bo_gpuva(struct panthor_kernel_bo *bo)101{102 return bo->va_node.start;103}104 105static inline size_t106panthor_kernel_bo_size(struct panthor_kernel_bo *bo)107{108 return bo->obj->size;109}110 111static inline int112panthor_kernel_bo_vmap(struct panthor_kernel_bo *bo)113{114 struct iosys_map map;115 int ret;116 117 if (bo->kmap)118 return 0;119 120 ret = drm_gem_vmap_unlocked(bo->obj, &map);121 if (ret)122 return ret;123 124 bo->kmap = map.vaddr;125 return 0;126}127 128static inline void129panthor_kernel_bo_vunmap(struct panthor_kernel_bo *bo)130{131 if (bo->kmap) {132 struct iosys_map map = IOSYS_MAP_INIT_VADDR(bo->kmap);133 134 drm_gem_vunmap_unlocked(bo->obj, &map);135 bo->kmap = NULL;136 }137}138 139struct panthor_kernel_bo *140panthor_kernel_bo_create(struct panthor_device *ptdev, struct panthor_vm *vm,141 size_t size, u32 bo_flags, u32 vm_map_flags,142 u64 gpu_va);143 144void panthor_kernel_bo_destroy(struct panthor_kernel_bo *bo);145 146#endif /* __PANTHOR_GEM_H__ */147